Oar structure for rowboats



Jam 26, 1943. Y s; 1'. AAREs'rAD l 2,309,491

oAR sTnucTuE Fon RowoATs A K Filed oct'. 24. 1941 s sheets-sheet 1 Attorney Jan. 26, 143. s. T. AAREsTAD OAR `STRUCTURE FOR ROWBO'ATS 3 Sheets-Sheet 2 Filed Oct. 24, 1941 Inventor -Altnrllej Jan. 26, 1943. s. 'LAAREs-mn 2,309,491

' OAR STRUCTURE FoRnowBoATs Filed OMI. V241, 1941 3 Sheets-Sheet 3 Inventar v 'Attorney Patented Jan. 26, 1943 OAR STRUCTURE FOR ROWBOATS Stanley Theodore Aarestad, McHenry, N. Dak., assigner of one-half to Selmer Joseph Aarestad,

McHenry, N. Dak.

Application October 24, 1941, Serial No. 416,416

2 Claims.

This invention relates to new and useful improvements in manual propulsion means for boats and more particularly to an oar mechanism for 4 rcwboats.

Figure 2 is a fragmentary side elevational View of one of the oar mechanisms.

Figure 3 is a fragmentary top pla-n view of one of the oar mechanisms showing the box cover removed.

Figure 4 is an enlarged fragmentary detailed sectional View of one of the oar boxes with its cover removed.

Figure 5 is an end elevational View of one of the oar boxes with the cover removed.

Figure 6 is a side elevational view of one of the oar lock sockets.

Figure '7 is a top plan view of one of the oar lock sockets.

Figure 8 is a perspective view of one of the oar lock boxes with the cover thereof removed.

Figure 9 is a perspective view of one of the pin structures of the oar locks.

Figure 10 is an enlarged horizontal sectional view taken substantially on line IEl-I of Figure 6.

Figure 11 is a fragmentary detailed sectional view through the cover of the oar box.

Figure 12 is a fragmentary cross-sectional view through the structure shown in Figure 11.

Referring to the drawings wherein like numerals designate like parts, it can be seen in Figure 1, that numeral 5 generally refers to the rowboat equipped with a pair of oar structures 6, 6 each of which is constructed identically with the other and which form the substance of the present invention.

Each of these oar structures 6 consists of a box 'I having vertically disposed side walls 8, 8 and end walls 9, 9, each broken away to afford a clearance for rockable arms l0, I I. These arms IIl and II are rockable on upstanding rollers I2 mounted on the bottom of the box 1 and each of these arms has a socket structure I3 at its outer end. The socket structure I3 of the arm `the socket I3 of the arm II receives the inner end of the blade section I5. The inner ends of the arms l0 and II are equipped with meshing segmental gears I6, I1, respectively. Obviously when the handle sections I4 are moved forwardly, the blade sections I5 will be moved in a likewise direction thus permitting a rowboat 5 to be rowed in the direction faced by the rower.

A lock structure is provided for each oar mechanism and these lock structures each consists of a T-shaped member I8, including the transverse cross-head which is hollow to receive a pin I9 which extends through apertured lugs 20, on the bottom of the box 'I whereby the crosshead is rotatably mounted on the bottom of said box. This T-shaped pin structure I8 has a ball head 2| at its lower edge and a circumferential groove 22 just above this head 2l. Ribs 23, 23 depend from the end portions of the crosshead of the pin structure.

A socket structure for the lock mechanism is shown in Figures 6, 7, and l0 and consists of a plate 24 which is secured by screws or the like to the inner side of the gunwale of =a rowboat. This plate 24 has a vertically disposed tube or barrel 25 intersected by a slot 26 in which a cockable catch 21 is movable. A spring 28 impinges against one end of this rockable catch 21 to hold the same disposed bodily into the tube 25 and in the circumferential groove 22 of the pin I8 for the purpose of preventing rising of the pin from the socket structure.

Just below the groove 22 and where the ball 2| connects with the shank of the T-shaped member I8 is a second groove 36.

The upper edge portion of the plate 24 has hollow box-like formations 29, 29 for the reception of the depending ribs 23, 23 on the crosshead of the pin structure I8.

So that the oars may be locked in straight position, a catch in the form of a bell crank 30 is employed, A cover 3l is provided for the box 'I and is .secured onto the box by the disposition of screws 32 extending through the cover 3l and into threaded openings in the center studs 33 of the bearing rollers I2.

The cover plate 3| is formed with an opening 34 and adjacent this opening are upstanding ears 35 between which the bell crank shaped detent 30 is located. Obviously by swinging this dctent downwardly through the opening 34 to engage into a recess 31 in the segmental gear I6, the gear I5 will be held against actuation.

Obviously when the catch 21 is swung outlu receives one end of a handle section I4, while wardly in removed position from the groove 22.

the box 'I can be lifted and the catch 21 placed in the groove 36. This will hold the box 'I elevated with the lugs 23 sufiiciently above the boxlike formations 29, 29, to the end that the entire box structure can be swung to bring the ores into the boat.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the claimed as new is:

l. An oar mounting comprising a box-like casing, a pair of blade and handle sections, respectively, pivoted in said casing to extend from opposite sides thereof and geared together in the casing, and means to mount said casing on the gunwale of a boat for pivotal movement about right angularly related axes comprising a plate for attachment to said gunwale and including a barrel, a T-shaped member including a shank rotatable in said barrel and a crosshead rotatably mounted on the bottom of the casing, coengaginvention what is ing detent devices on said head and plate for preventing rotation of said shank in said barrel, said shank being adjustable outwardly of the barrel to disengage said devices and permit rotation of said member about the axis of the barrel.

2. An oar mounting comprising a box-like casing, a pair of blade and handle sections, respectively, pivoted in said casing to extend from opposite sides thereof and geared together in the casing, and means to mount said casing on the gunwale of a boat for pivotal movement about right angularly related axes comprising a plate. for attachment to said gunwale and including a barrel, a T-shaped member including a shank rotatable in said barrel and a crosshead rotatably mounted on the bottom of the casing, coengaging detent devices on said head and plate for preventing rotation of said shank in said barrel, said shank being adjustable outwardly of the barrel to disengage said devices and permit rotation of said member about the axis of the barrel, and latch means for holding said shank against outward adjustment and in inwardly adjusted position, respectively.

STANLEY T. AARESTAD. 

